<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function Car() {
            this.lastName
        };
        var car=new Car();
        Car.prototype.lastName='张三';
        // console.log(Car.prototype.lastName);

        // console.log(car.prototape);
        console.log(car);
    </script>
</body>
</html>